0.5-2.5mm Longer Life - Full Grinding Titanium Twist Drill Bits, Woodworking Drills Bit Set HSS Straight Shank Drill Tools For Wood Metal Drilling Holes
Precision Twist Taper Drill Cobalt Parabolic #36 135 Dg HSS S/P L 4 5/8" Flute 2 1/2" Precision Twist Drill Parabolic flute drill bits, these have a large flute space for greater chip flow and improved coolant flow to the drill bit point. These factors allow bits to drill deeper and produce closer hole tolerances more quickly than regular jobbers bits. A large cross section increases rigidity and strength.
Precision Twist Taper Drill Cobalt Parabolic #40 135 Dg HSS S/PL 4 5/8" Flute 2 1/2" Precision Twist Drill Parabolic flute drill bits, these have a large flute space for greater chip flow and improved coolant flow to the drill bit point. These factors allow bits to drill deeper and produce closer hole tolerances more quickly than regular jobbers bits. A large cross section increases rigidity and strength.
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